Resonant electron transfer between quantum dots

TL;DR

This paper theoretically predicts a resonant electron transfer effect between two quantum dots, which could enable reversible quantum logic gates by exploiting bound state energies near the barrier top.

Contribution

It introduces the concept of resonant electron transfer between quantum dots based on the existence of an excited bound state close to the barrier top.

Findings

Resonant electron transfer is predicted under specific energy conditions.

The effect can facilitate quantum logic gate operations.

Bound state energies are critical for the transfer mechanism.

Abstract

An interaction of electromagnetic field with a nanostructure composed of two quantum dots is studied theoretically. An effect of a resonant electron transfer between the localized low-lying states of quantum dots is predicted. A necessary condition for such an effect is the existence of an excited bound state whose energy lies close to the top of the barrier separating the quantum dots. This effect may be used to realize the reversible quantum logic gate NOT if the superposition of electron states in different quantum dots is viewed as the superposition of bits 0 and 1.